ci-operator/openshift/os: Re-enable nightly RHCOS builds

[travier]

Only build the machine-os-content container image and push it to the
rhcos-devel namespace.

Revert and improve on:

• 4fcb704 ci-operator/openshift/os: 4.11: Remove unused periodic jobs

[travier]

CC @cheesesashimi

[cheesesashimi]

/lgtm
/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cheesesashimi, travier

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Needs approval from an approver in each of these files:

• ci-operator/config/openshift/os/OWNERS [travier]
• ci-operator/jobs/openshift/os/OWNERS [travier]

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[openshift-ci]

@travier: all tests passed!

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[openshift-ci]

@travier: Updated the following 4 configmaps:

• job-config-master-periodics configmap in namespace ci at cluster app.ci using the following files:
  • key openshift-os-master-periodics.yaml using file ci-operator/jobs/openshift/os/openshift-os-master-periodics.yaml
• job-config-master-postsubmits configmap in namespace ci at cluster app.ci using the following files:
  • key openshift-os-master-postsubmits.yaml using file ci-operator/jobs/openshift/os/openshift-os-master-postsubmits.yaml
• job-config-master-presubmits configmap in namespace ci at cluster app.ci using the following files:
  • key openshift-os-master-presubmits.yaml using file ci-operator/jobs/openshift/os/openshift-os-master-presubmits.yaml
• ci-operator-master-configs configmap in namespace ci at cluster app.ci using the following files:
  • key openshift-os-master__periodic.yaml using file ci-operator/config/openshift/os/openshift-os-master__periodic.yaml

Details

In response to this:

Only build the machine-os-content container image and push it to the
rhcos-devel namespace.

Revert and improve on:

• 4fcb704 ci-operator/openshift/os: 4.11: Remove unused periodic jobs

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.